noun
shigella; dysentery bacillus
Medical term for the bacterium that causes bacillary dysentery (赤痢). Used in clinical and biological contexts.
赤痢菌は、汚染された水や食べ物を介して感染する。
Shigella bacteria are transmitted through contaminated water or food.
検査の結果、赤痢菌が検出された。
The test detected shigella bacteria.
細菌 is a general term for bacteria; 赤痢菌 specifies the dysentery-causing shigella.
Compound of 赤痢 (dysentery) + 菌 (bacterium). The exact historical derivation is uncertain, but the term follows standard medical naming patterns.